mirror of
https://github.com/rn10950/RetroZilla.git
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326 lines
8.3 KiB
C++
326 lines
8.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Communicator client code, released
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* March 31, 1998.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Samir Gehani <sgehani@netscape.com>
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* Benjamin Smedberg <bsmedberg@covad.net>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsINIParser.h"
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#include "nsError.h"
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#include "nsILocalFile.h"
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#include <stdlib.h>
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#include <stdio.h>
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#if defined(XP_WIN) || defined(XP_OS2)
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#define BINARY_MODE "b"
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#else
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#define BINARY_MODE
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#endif
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// Stack based FILE wrapper to ensure that fclose is called, copied from
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// toolkit/mozapps/update/src/updater/readstrings.cpp
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class AutoFILE {
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public:
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AutoFILE(FILE *fp = nsnull) : fp_(fp) {}
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~AutoFILE() { if (fp_) fclose(fp_); }
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operator FILE *() { return fp_; }
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FILE** operator &() { return &fp_; }
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private:
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FILE *fp_;
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};
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nsresult
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nsINIParser::Init(nsILocalFile* aFile)
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{
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nsresult rv;
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/* open the file */
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AutoFILE fd;
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rv = aFile->OpenANSIFileDesc("r" BINARY_MODE, &fd);
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if (NS_FAILED(rv))
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return rv;
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return InitFromFILE(fd);
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}
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nsresult
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nsINIParser::Init(const char *aPath)
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{
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/* open the file */
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AutoFILE fd = fopen(aPath, "r" BINARY_MODE);
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if (!fd)
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return NS_ERROR_FAILURE;
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return InitFromFILE(fd);
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}
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// Based on toolkit/mozapps/updater/src/updater/updater.cpp
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// we could use nsCRT::strtok except that nsCRT isn't part of the glue,
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// and may never be due to NSPR dependencies. This should probably be declared
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// and exported in a string-management glue header.
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/**
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* Scan "str" for the first character that is not in "delims".
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*/
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static char*
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mstrspnp(const char *delims, char *str)
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{
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const char *d;
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do {
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for (d = delims; *d != '\0'; ++d) {
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if (*str == *d) {
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++str;
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break;
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}
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}
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} while (*d);
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return str;
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}
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static char*
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mstrtok(const char *delims, char **str)
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{
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if (!*str)
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return NULL;
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char *ret = mstrspnp(delims, *str);
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if (!*ret) {
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*str = ret;
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return NULL;
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}
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char *i = ret;
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do {
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for (const char *d = delims; *d != '\0'; ++d) {
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if (*i == *d) {
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*i = '\0';
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*str = ++i;
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return ret;
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}
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}
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++i;
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} while (*i);
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*str = NULL;
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return ret;
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}
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static const char kNL[] = "\r\n";
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static const char kEquals[] = "=";
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static const char kWhitespace[] = " \t";
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static const char kRBracket[] = "]";
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nsresult
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nsINIParser::InitFromFILE(FILE *fd)
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{
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if (!mSections.Init())
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return NS_ERROR_OUT_OF_MEMORY;
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/* get file size */
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if (fseek(fd, 0, SEEK_END) != 0)
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return NS_ERROR_FAILURE;
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long flen = ftell(fd);
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if (flen == 0)
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return NS_ERROR_FAILURE;
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/* malloc an internal buf the size of the file */
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mFileContents = new char[flen + 1];
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if (!mFileContents)
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return NS_ERROR_OUT_OF_MEMORY;
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/* read the file in one swoop */
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if (fseek(fd, 0, SEEK_SET) != 0)
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return NS_BASE_STREAM_OSERROR;
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int rd = fread(mFileContents, sizeof(char), flen, fd);
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if (rd != flen)
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return NS_BASE_STREAM_OSERROR;
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mFileContents[flen] = '\0';
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char *buffer = mFileContents;
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char *currSection = nsnull;
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INIValue *last = nsnull;
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// outer loop tokenizes into lines
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while (char *token = mstrtok(kNL, &buffer)) {
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if (token[0] == '#' || token[0] == ';') // it's a comment
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continue;
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token = mstrspnp(kWhitespace, token);
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if (!*token) // empty line
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continue;
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if (token[0] == '[') { // section header!
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++token;
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currSection = token;
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last = nsnull;
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char *rb = mstrtok(kRBracket, &token);
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if (!rb || mstrtok(kWhitespace, &token)) {
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// there's either an unclosed [Section or a [Section]Moretext!
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// we could frankly decide that this INI file is malformed right
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// here and stop, but we won't... keep going, looking for
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// a well-formed [section] to continue working with
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currSection = nsnull;
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}
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continue;
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}
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if (!currSection) {
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// If we haven't found a section header (or we found a malformed
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// section header), don't bother parsing this line.
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continue;
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}
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char *key = token;
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char *e = mstrtok(kEquals, &token);
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if (!e)
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continue;
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INIValue *val = new INIValue(key, token);
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if (!val)
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return NS_ERROR_OUT_OF_MEMORY;
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// If we haven't already added something to this section, "last" will
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// be null.
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if (!last) {
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mSections.Get(currSection, &last);
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while (last && last->next)
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last = last->next;
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}
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if (last) {
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// Add this element on to the tail of the existing list
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last->next = val;
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last = val;
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continue;
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}
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// We've never encountered this section before, add it to the head
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mSections.Put(currSection, val);
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}
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return NS_OK;
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}
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nsresult
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nsINIParser::GetString(const char *aSection, const char *aKey,
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nsACString &aResult)
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{
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INIValue *val;
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mSections.Get(aSection, &val);
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while (val) {
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if (strcmp(val->key, aKey) == 0) {
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aResult.Assign(val->value);
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return NS_OK;
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}
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val = val->next;
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}
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return NS_ERROR_FAILURE;
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}
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nsresult
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nsINIParser::GetString(const char *aSection, const char *aKey,
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char *aResult, PRUint32 aResultLen)
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{
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INIValue *val;
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mSections.Get(aSection, &val);
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while (val) {
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if (strcmp(val->key, aKey) == 0) {
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strncpy(aResult, val->value, aResultLen);
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aResult[aResultLen - 1] = '\0';
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if (strlen(val->value) >= aResultLen)
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return NS_ERROR_LOSS_OF_SIGNIFICANT_DATA;
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return NS_OK;
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}
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val = val->next;
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}
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return NS_ERROR_FAILURE;
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}
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PLDHashOperator
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nsINIParser::GetSectionsCB(const char *aKey, INIValue *aData,
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void *aClosure)
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{
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GSClosureStruct *cs = NS_REINTERPRET_CAST(GSClosureStruct*, aClosure);
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return cs->usercb(aKey, cs->userclosure) ? PL_DHASH_NEXT : PL_DHASH_STOP;
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}
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nsresult
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nsINIParser::GetSections(INISectionCallback aCB, void *aClosure)
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{
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GSClosureStruct gs = {
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aCB,
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aClosure
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};
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mSections.EnumerateRead(GetSectionsCB, &gs);
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return NS_OK;
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}
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nsresult
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nsINIParser::GetStrings(const char *aSection,
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INIStringCallback aCB, void *aClosure)
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{
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INIValue *val;
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for (mSections.Get(aSection, &val);
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val;
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val = val->next) {
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if (!aCB(val->key, val->value, aClosure))
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return NS_OK;
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}
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return NS_OK;
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}
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